Final answer:
J.J. Thomson discovered the electron in 1897 and proposed the plum pudding model, leading to his Nobel Prize in Physics in 1906.
Step-by-step explanation:
The electron was discovered by J.J. Thomson in the year 1897. After its discovery, Thomson proposed the plum pudding model in which he suggested that electrons are embedded within a sphere of positive charge, similar to plums in a pudding. His groundbreaking work, which profoundly changed our understanding of atomic structure, earned him the Nobel Prize in Physics in 1906.
The electron was discovered by J.J. Thomson in 1897. Thomson experimented with a device called a cathode ray tube, in which an electric current was passed through gases at low pressure. He observed a glowing beam (the cathode ray) traveling from the negatively charged cathode to the positively charged anode, proving the existence of electrons.